Anyone else getting shit slow MH with 280x ?? my 7950 is way faster??

In the microcoin miner window it starts showing like this   2.35mh/6.66mh    

then after a second it just drops to like


2.16mh/2.16mh ??



it seems like it starts to build up speed then stops and falls back to 2MH,  the temps are cold like 45 degrees, they normally run at 80 with scrypt ?

tried intensity 13 and 20 makes no difference.